{"id":9361,"date":"2020-08-07T19:07:04","date_gmt":"2020-08-07T23:07:04","guid":{"rendered":"http:\/\/www.willegal.net\/blog\/?p=9361"},"modified":"2020-08-07T19:07:04","modified_gmt":"2020-08-07T23:07:04","slug":"details-of-a-factory-scelbi-power-supply","status":"publish","type":"post","link":"http:\/\/www.willegal.net\/blog\/?p=9361","title":{"rendered":"Details of a Factory SCELBI Power Supply"},"content":{"rendered":"\n
\"\"
SCELBI Power Supply<\/figcaption><\/figure>\n\n\n\n

Here is the front of the factory power supply that is part of the SCELBI-8B system described in the last post. A simple on-off switch, three banana plugs\/binding posts, (+5 volts\/-9 volts\/ground) and an Amphehol 4 pin socket for connecting power to the chassis make up the controls and connections on the front. On the back is a fuse and fitting for passing the AC power cord through the back of the chassis. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The inside reveals space at the top of the picture for a 110 volt AC fan which is bolted to the cover. The cover has ventilation holes drilled in both ends to allow the fan to draw in cooling air. Two Power-One supplies make up the power supplies. One is 5 volts and the other is a Power-One 12-15 volt supply modified to output 9 volts. The positive output of the 9 volt supply is connected to the negative output of the 5 volt supply which becomes ground for the system. The negative output of the 9 volt supply becomes -9 and the positive output of the 5 volt supply supplies +5 volts to the system. <\/p>\n\n\n\n

All in all, the whole thing is an extremely simple affair, the only complication being the changing of a resistor in order to covert the 12-15 volt supply to a 9 volt supply. This unit did not actually use banana plugs for power delivery to peripherals, but ordinary hook-up wire connected to the binding posts.<\/p>\n\n\n\n

In my next post I will describe the problem with the power supply and how I resolved it.<\/p>\n","protected":false},"excerpt":{"rendered":"

Here is the front of the factory power supply that is part of the SCELBI-8B system described in the last post. A simple on-off switch, three banana plugs\/binding posts, (+5 volts\/-9 volts\/ground) and an Amphehol 4 pin socket for connecting … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,7],"tags":[],"class_list":["post-9361","post","type-post","status-publish","format-standard","hentry","category-8008-scelbi","category-apple"],"_links":{"self":[{"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9361"}],"version-history":[{"count":6,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9361\/revisions"}],"predecessor-version":[{"id":9367,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9361\/revisions\/9367"}],"wp:attachment":[{"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9361"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.willegal.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}